Filtering material.



NITED STATES PATENT OFFICE.

NIcHoLAs LANsER, OF ALLEGHENY, PENNSYLVANIA.

' FILTERING MATERIAL.

SPECIFICATION forming part of Letters Patent No. 656,552, dated August21, 1900.

Application filed March 6,1900. SeriaINo. 7,585. (Nospecimena) To allwhom it may concern:

.Be it known that I, NICHOLAS LANSER, a citizen of the United States ofAmerica,'residing at Allegheny, in the county of Allegheny and State ofPennsylvania, have invented certain new and useful Improvements inFiltering Material, of which the following is a specification.

This inventionrelates to certain new and useful improvements infiltering materialand method of manufacturing the same.

The invention aims to produce a filtering material which shall embodyall the properties of natural stone used for filtering purposes, and atthe same time be as efficient in its use, and, furthermore,comparatively inexpensive to manufacture.

a filtering material consisting of mineral wool obtained from the refuseobtained during the manufacture of steel and iron, washing the mineralwool in boiling waterfor removing all its impurities, removing thewater'thcrefrom, solidifying the mass in a porous man.- ner, thusforming what I term mineral felt, adding thereto, if desirable, fifteento twentyfiveper cent. of clay, and then baking the same. I

The invention finally consists in the novel method for producing afiltering material, which shall be hereinafter more specificallydescribed, and particularly pointed out in the claims.

The filtering material is prepared in the following manner: -I take asuitable quantity of mineral wool, which is a refuse obtained in themanufacture of steel and iron and wash the same in boiling water untilall the impurities are removed. The wool is then pressed,

forcing the water therefrom, thus solidifying,

, I clay. Briefly described the invention consists of I As heretoforestated, a filtering material constructed of the ingredients and in themanner as herein set forth possesses all the properties contained in anatural filteringstone, and, furthermore, can be manufactured at acomparatively-small cost.

It is thought that the many advantages of my improved filteringmaterial, as well as the simplicity in manufacturing the same, can bereadily understood from the foregoing description. T

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is

I 1. As a new article of manufacture, a fil tering material consistingof mineral felt and 2. As a new article of tering material consisting ofmineral wool so lidified in a porous manner, and a suitable quantity ofclay added thereto. 4

3. The herein-described method of manufacturing a filtering materialconsisting of first taking a quantity of mineral wool and boiling theimpurities therefrom, second solidifying the same in'a porous manner'andremoving the water therefrom, third suitably adding thereto a quantityof clay, and fourth baking the said clay and mineral wool.

4. The herein-described method of manufacturing a filtering materialconsisting in first taking a quantity of mineral wool and removing theimpurities therefrom, second solidifying the same in a porous manner,third adding thereto a quantity of clay, and

fourth baking the said clay and wool.

5. The herein-described method of manu facturing a filtering materialconsistingin first taking a quantity of mineral wool and removing theimpurities therefrom, second solidifying the same in aporous manner,

. third adding thereto fifteen to twenty-five per manufacture, a fil

